Many people were wrongly punished, so society suffered greatly afterwards.
Literature was hindered, due to writers being sent to re-education. About 2,600 writers were persecuted for having unfit works of writing.

After Mao died, a period of de-maozation occured. In 1979, Deng created a diplomatic relation with the rest of the world.
A quote from Deng in regards to economic policy:
"We mustn't fear to adopt the advanced management methods applied in capitalist countries (...) The very essence of socialism is the liberation and development of the productive systems (...) Socialism and market economy are not incompatible (...) We should be concerned about right-wing deviations, but most of all, we must be concerned about left-wing deviations."
From there, a gradual shift from a communist economy formed more like a market economy. The Chinese offered vast, cheap labor and huge domestic markets. More recently, in 2001, China joined the World Trade Organization.

http://www-chaos.umd.edu/history/prc4.html